[ticket/12841] Allow extensions to position new config vars
* VSEphpbb/ticket/12841:
[ticket/12841] Make config position default to after
[ticket/12841] Update comments in tests making after default
[ticket/12841] prefix function name with phpbb_
[ticket/12841] Add a tests for the new function
[ticket/12841] Fix white space issues reported by sniffer
[ticket/12841] Allow extensions to position new config vars
[ticket/12775] Replace functions_container with a container_builder class.
* Nicofuma/ticket/12775: (34 commits)
[ticket/12775] Set dbal.conn.driver as synthetic during installation
[ticket/12775] Add the definition of dbal.conn in fixtures/config/services.yml
[ticket/12775] Inject the connection when created in the container
[ticket/12775] Extract the vars later in install/install_update.php
[ticket/12775] Rename config_php_handler to config_php_file container_builder
[ticket/12775] Set defined_vars as a property of config_php_file
[ticket/12775] Fix doc blocks in the container builder
[ticket/12775] Remove useless includes of config.php
[ticket/12775] Move phpbb_convert_30_dbms_to_31 into the config file class
[ticket/12775] Fix comments
[ticket/12775] Update doc blocks
[ticket/12775] Fix container_builder
[ticket/12775] Rename config_php to config_php_file
[ticket/12775] Renamed to \phpbb\di\container_builder
[ticket/12775] Remove the last include of functions_container
[ticket/12775] Fix unit tests
[ticket/12775] Add tests for \phpbb\config_php
[ticket/12775] Add tests for the container factory
[ticket/12775] Use a field instead of a local var in load_config_var()
[ticket/12775] Update container and config in install/
...
[ticket/12787] Allow the route to say that the referer has to be used.
* Nicofuma/ticket/12787:
[ticket/12787] Updates phpbb_mock_controller_helper
[ticket/12787] Add controller_helper::get_current_url()
[ticket/12787] Remove one app.php when it's both in $path and $web_root_path
[ticket/12787] Fix the absolute board url
[ticket/12787] Use a parameter (_referer) instead of the Referer header
[ticket/12099] Add unit tests for get_web_root_path_from_ajax_referer()
[ticket/12099] Remove config again
[ticket/12099] Correctly fix the path when performing AJAX requests
[ticket/12099] Add request argument to path_helper service
